Bearing for double-twist spindles



Oct. 26, 1954 K. LANDOLT BEARING FOR DOUBLE-TWIST SPINDLES Filed Aug. 1l, 1950 6..... :man n A JNVENTOR.

Patented Oct. 26, 1954 UNITED STATES ea'raNT oFFIcE Claims priority, application Switzerland October 12, 1949 4 Claims.

The present invention relates to an improved bearing support for the stationary part of double-twist spindles. My improved bearing makes it possible for the spindles to be of simpliiied form, and also facilitates the threading-in. of the yarn. My bearing construction has the further advantage that it may be lubricated with very liquid oil, the excess oil being retained in a small storage chamber and the mechanical stress on the bearing being minimised. rifhe essential features of the bearing of the invention reside in the fact that the stationary inner part of the double-twist spindle is supported by anti-friction bearings in a tubular portion of the rotary body, whereby the outer race of the bearing rotates, and in the center of the tubular portion of the rotary body there is an inset having a curved groove which communicates both with a slot in the tubular part and with the central bore of the stationary part. At least at the lower end of the bearing a rotating circular trough is arranged for the inner stationary parts. The mechanical stress on the bearing is reduced in that the stationary parts Within the spindle are associated with the bearing by means of at least one Iiexible member. According to the invention, a particularly advantageous construction is obtained by reason of the fact 'that the inset in the ,tubular part of the rotary body is integral with the spindle shaft which has the rotary part mounted upon it.

The accompanying drawing shows, by way of example, illustrative embodiments of the invention.

Fig. 1 is a sectional View showing a doubletwist spindle embodying features of the invention;

Fig. 2 is a similar view oi another embodiment; and

Fig. 3 is a sectional view of a further embodiment.

Referring particularly to Fig. 1, the thread I is taken up over head from a thread body 3 wound upon a tube 2 non-rotatably supported on tube 4 of the stationary body 5, being itself supported by ball bearings t in the tubular portion 1 of the rotary body 8. The body 5 is held at rest by means of a magnet I9 and a countermagnet t mounted on body 5. The tubular portion I of the rotary body 8 denes the wharve It driven by a belt I I in the usual manner. The wharve I is rigidly connected to the spindle I2, the latter being supported by conventional means.

The thread I passes through the stationary tube 4 and is led over the thread guiding members I3 and I5 to the outer rim of the rotary body 8. The thread then passes the periphery of the body 5 and passes, with the formation oi a Aso-oalled balloon, through the eyelet I6, from which it is fed to the desired point.

rIhe tubular part 'I of the rotary body permits the provision of an inset 2t having a surface sloping toward the slot 2l, a thread-guide body being positioned as shown at I3, which, according to the invention, has the shape of a horse-shoe and forms the upper closing of the slot 2l in the tubular portion l. Other threadguide bodies, such as shown at I5, are preferably of such design that they include lateral projections drected outwardly from inside the rotary body, these projecting portions preventing throwing oli of the thread.

In the embodiment shown in Fig. 2, wherein corresponding parts are designated by the saine reference numerals used in Fig. 1 with the addition of itil, the tubular portion It? is attached to the spindle shaft I i2 and is itself supported in conventional manner. Seated on the tubular portion Il is the rotary body I which could, if desired, be formed integrally with the tubular body IU'I. lt is, however, preferable to have it made separately, because then it may be manufactured from light material, such as Bakelite (phenol-aldehyde resin) with a fabric insert. The tubular body lill accommodates the two ball bearings It which, however, could be replaced by a single bearing. Seated Within the bearing It is the stationary tube IEM having the stationary part E05 mounted upon it by means oi the tubular extension H4. The stationary part II5 is normally designed as a thread guiding' body. Characteristic of the structure of the invention are those portions of the device positioned beneath the ball bearing Iili, i. e. the rotating ring I Il seated within the tubular portion |07, which ring, together with the similarly-- mounted upwardly hanged sheet-iron H8, forms the so-called rotating trough. Both of the inembers I Il and I It are iiXed within the tubular part IZJI in such manner that substantially no oil can percolate between them. Therefore, they may be soldered or melted together or even be formed as one piece, or alternatively, a packing may be interposed between them or around them. A similar trough IZB, held in place by the spring ring I23, is provided above the bearing. Downwardly flanged ldiscs 24 and 525 are held in Contact with the stationary tube |84 along with the spacer ring IZS by mcansof the spring ring |21.

At the top the bearings are held by the extension H4 of the stationary body |05, whereby, aecording to the invention, the oil supply enters from the topy through the tubular extension H4 of body |05 positioned above the ball bearings |06 on the stationary tube |04. The oil supplied passes the ball bearings and drips over'the disc |24 into the rotating trough Il, H8. There the oil is collected until it overflows and runs along the spacer ring |2t` and drips onto the downwardly flanged dise |25, leaving the tubular part through slot |28. It is important to prevent the dripping oil from soiling the thread guiding body i I3, since otherwise the thread reaching the outer contour of the rotary body |08 through the interior of tube |04 through aperture |28, is

`likely to be smudged. When the spindle starts to rotate, the oil tends to rise from the trough l1, i8 into the ball bearing. But it isonly permitted to reach the upper groove |22. On stoppage of the spindle the oil is recollected in the groove Hl, H8. Trough |51, HG and groove |22 as well as the discs |24 and |25 cooperate to ensure a very efcient seal and protection from dust.

In Fig. 3 the. shaft 2|-2 is, as with ordinary spindles, supported in a casing (not shown). Attached to its top is the wharve2 I 0 with tapered seat and tubular extension 20T. Outside the V-wharve, the rotary body 208 is seated, and

mounted within the tubular extension 23'? are the two ball bearings 2stv carrying the stationary tube 20d with their inner races. Seated onv the upper tapered end of tube 20d is the iiexible sleeve 229 which in turn carries the stationary body 205. The tube 20M is connected to the stationary body 205 through a tubular socket 2|@ integral with a supporting disc 230 on which is positioned a vibration damping sheet 23|.. rlhe tubular thread body support 202 is seated on the upper end of tube 2040, and is supported on the damping sheet 23|.

From the thread body 2133 the thread 20| runs to the upper inlet of tube 205m, passes through it, then passes through tube 204 and leaves' the wharve through slot 228 and thread-guidey 2|3. Thence the thread swings in theforrn of a balloon around the rotatable body 208'and the stationary body 205 to the upper eyelet 246, whence it is carried to the Winder (not shown).

In practice, small vibrations ofl the shaft 2|2 cannot be avoided and they are transferred to the bearings 20B and tube 204. They may, however, be damped to an appreciable extent by reason of the provision between stationary body 2.05 and stationary shaft 201i of the sleeve 220 of flexible material, say, rubber. Above all it is important, however, that these vibrations be not transferred to the members 202, 203. In accordance with the invention such vibration transfer is prevented by reason of the fact that the tubu lar support 202 is supported on tube 204e which in turn is supported on the tubular extension 2 Hl which is preferably formed from plastic material; It will be clearly seen that the oscillations of shaft 2|2 would greatly increase toward the top of tube 204:1 if this were not preventedI by at least one of the flexible intermediate members 229 or 2 I4. rIhe longer and thinner the tube 224e is, the quieter its top will be. For this reason the tubular support 202 contacts neither the lower portion of tube204a nor the extension 211i, because, according to the invention, it rests upon a damping sheet 23| which preferably is formed from textile material, e. g. velvet, or animal hides,

In order to center and guide lower ange of the Support 202 to some extent, the disc 230 may be provided with an annular ridge 232.

Alternatively, the flexible sleeve may be omitted, especially if the body 205 is formed from comparatively light material, because the socket 2|4- and the thin-walled and hence also elastic tube 294g, will damp the oscillations suiciently, that they will not be transferred to the support 202. In this case the body 205, the socket 2 i4 and the disc 230 may be united to form an integral unit.

lil/'hat I claim is:

1. In a double-twist spindle comprising a stationary body and a rotatable body having a tubular portion, anti-friction bearing means supporting the stationary body in the tubular portion of the rotatable body, the outer race of the bearing means being rotatable with the rotatable body, said stationary body having a vertical downwardly extending axial bore through which thethreadis adapted to pass and to enter the tubular portion of the rotatable body, said rotatable body having a slot for permitting the thread to pass freely to the exterior thereof, means defining an annular'chamber rotatable with said rotable body below the anti-friction bearing means, said chamber being adapted to hold a predetermined quantity of oil, the inner diameter of said chamber being less than the inner diameter of the outer race of the bearing means whereby the oil from the bearings is caught by the chamber when the spindle is stationary, the oil in said chamber being thrown by centrifugal force into the bearings upon rotation of said chamber during rotation. of said rotatable body.

2. In a double-twist spindle comprising a stationary body and a rotatable body having a tubular portion, anti-friction bearing means supporting the stationary body in the tubular portion of the rotatable body, the outerrraoe of the bearing means being rotatable with the rotatable body, said stationary body having a verticalv downwardly extending axial bore through which the thread is adapted to passend toenter theA tubular portionof the rotatable body, said rotatable body having a slot for permitting the thread to pass freely to the exterior thereof, means defining an annular chamber rotatable with said rotatable @body below the anti-friction bearing means, said chamber being adapted to hold a predetermined quantity o'f oil, the inner diameter of said chainber being less than the inner diameter of the outer race of the bearing means whereby the oil from the bearings is caught by the chamber when the'spindle is stationary, the oil. in said chamber being thrown by centrifugal force into the bearings upon-rotation of said chamber during rotation of said rotatable body, and a stationary annular member disposed below said bearing means and having a downwardly directed flange extending into said chamber for conducting oil owing from said bearings into` said chamber.

3. In a double-twist spindle comprising a stationary body and a rotatable body having a tubular portion, anti-friction bearingv means supporting the stationary body in the tubular portion of the rotatable body, the outer race of the bearing'rneans being rotatable with the rotatable body, said stationary body having a vertical downwardly extending axial bore through which the thread is adapted to pass and to enter the tubular portion of the rotatable body, said rotatable body having a slot for permitting the thread to pass freely tothe exterior thereof,

means defining an annular chamber rotatable with said rotatable body below the anti-friction bearing means, said chamber being adapted to hold a predetermined quantity of oil, the inner diameter of said chamber being less than the inner diameter of the outer race of the bearing means whereby the oil from the bearings is caught by the chamber when the spindle is stationary, the oil in said chamber being thrown by centrifugal force into the bearings upon rotation of said chamber during rotation of said rotatable body, a stationary annular member disposed below said bearing means and having a downwardly directed flange extending into said chamber for conducting oil flowing from said bearings into said chamber, and a second stationary disc disposed below said bearing means and having a downwardly directed ange extending into said chamber for deecting any excess oil flowing from` the chamber away from the stationary body.

4. In a double-twist spindle comprising a stationary body and a rotatable body having a tubular portion, anti-friction bearing means supporting the stationary body in the tubular portion of the rotatable body, the outer race of the bearing means being rotatable with the rotatable body, said stationary body having a vertical downwardly extending axial bore through which the thread is adapted to pass and to enter the tubular portion of the rotatable body, said rotatable body having a slot for permitting the thread to pass freely to the exterior thereof,

means dening an annular chamber rotatable with said rotatable body below the anti-friction bearing means, said chamber being adapted to hold a predetermined quantity of oil, the inner diameter of said chamber being less than the inner diameter of the outer race of the bearing means whereby the oil from the bearings is caught by the chamber when the spindle is stationary, the oil in said chamber being thrown by centrifugal force into the bearings upon rotation of said chamber during rotation of said rotatable body, and an annular shield member rotatable with said rotatable body overlying the bearing means and positioned to deflect downwardly oil thrown upwardly from said chamber.

References Cited in the flle of this patent UNITED STATES PATENTS Number Name Date 149,089 Bartley Mar. 31, 1874 914,794 Coe Mar. 9, 1909 1,793,190 Philips Feb. 17, 1931 1,323,638 Andrew et al Sept. 15, 1931 2,125,823 Stoddard Aug. 2, 1938 2,146,578 Honig Feb. 7, 1939 l 2,208,742 Archer July 23, 1940 2,245,564 Bergmann et al. June 17, 1941 2,374,085 Gwaltney et al Apr. 17, 1945 2,379,806 Kent July 3, 1945 2,411,126 Burnham Nov. 12, 1946 2,473,521 Gwaltney June 21, 1949 2,559,735 Roberts July 10, 1951 2,565,389 Meadows Aug. 21, 1951 

